IMPORTANT DEFINITIONS ABOUT SYMMETRY

✔ SYMMETRY: It is the quality of some shapes which some of their parts are reflections of others.

✔ REFLECTION SYMMETRY: It is a shape’s quality which is formed by two halves facing each other with an axis or fold line in between as if both sides were mirror images of each other.

✔ SYMMETRY AXIS: It is a line which divides a shape into two symmetric halves. Symmetric points are on perpendicular line to it.

✔ CENTRAL SYMMETRY:  It is the reflection of an object through a point called symmetry center. Symmetric pair of points are collinear with the center.